HOW TO FIND FILE SIZE ON CLIENT SIDE BEFORE UPLOADING

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hi all,

how can i find a file's size before uploading it? using javscript with activex is not supported by many browsers. but still it is possible on client side (gmail does it in all browsers when you attach a file on client side itself). plz help...

thanks & regards, AR

Posted 5-Feb-10 18:47pm

AR@JR

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Solution 2

but that requires sending the file to the server. there is a client side method for this that gmail uses, but i cant find how...

Posted 7-Feb-10 17:35pm

AR@JR

Solution 5

swfupload is doing the job just the way i wanted it...thanks a lot

Posted 11-Feb-10 22:08pm

AR@JR

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Graham Breach · Accepted Answer · 2010-02-07T23:14:00

Solution 4

GMail's attachment upload uses Flash to find the size and display the progress.

Here is another one that does the same thing: SWFUpload[^]

Posted 7-Feb-10 23:14pm

Graham Breach

4277480 · Accepted Answer · 2010-02-05T19:37:00

you cant use javascript but you can use ajax.
-------------------

Answer 2:

Use something like this:

if (FileUploadControl.HasFile)
            {
              double FileSize = FileUploadControl.PostedFile.ContentLength;
              double VerifyFileSize = FileSize / 1024 / 1024;
              bool Status = false;
             
              if (VerifyFileSize > 1)// where "1 MB" is the size
              {
                  Status = true;
              }

                FileSizeStatusLabel.Text = FileSize.ToString() + " " + (Status ? "to big" : "size ok");
            }

I mentioned Ajax to get rid of the post back. However, as I said you cant get it using client js

Christian Graus · Accepted Answer · 2010-02-07T17:45:00

Solution 3

As far as I can tell, an iFrame is doing the actual submission of the file, while you look at the rest of the page. I'm not sure how it's working out the file size, I did some googling and couldn't find any info. Perhaps they are faking it ?

Posted 7-Feb-10 17:45pm

Christian Graus

HOW TO FIND FILE SIZE ON CLIENT SIDE BEFORE UPLOADING

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